Buono Hopes for a Spark With Her No. 2 Pick

EAST RUTHERFORD, N.J.—Seeking to infuse some excitement into her underdog campaign for New Jersey governor, state Sen. Barbara Buono on Monday said a Hispanic union leader will be joining her on the Democratic ticket.

The selection of Milly Silva to run for lieutenant governor creates the first all-female ticket for governor in New Jersey, and the announcement in Bergen County presented one of the most well-attended and exuberant events for Ms. Buono, who is well behind Republican Gov. Chris Christie in fundraising and in...